Street-sweeping machine.



1. M. MURPHY. STREET SWEEPING MACHINE. APPLICATION EILED Aue.21. I913.

Patented Sept. 4, 1917.

5 SHEETSSHEET I.

. l. M. MURPHY.

STREET SWEEPING MACHINE.

' APPLICATION FILED AUG.2I. 19l3. 1,239,293. Patented Sept. 4,1917.

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267525545 1 Z n V672 201 I .l. M. MURPHY.

STREET SWEEPING MACHINE.

APPLICATION FILED AUG-2!. I913.

1,239,293. Patented Sept. 4,1917.

5 SHEETSSHEET 3.

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1. M. MURPHY STREET SWEEPING MACHINE.

Patented Sept. 4, 1917.

5 SHEETS-SHEET 4 APPLICATION FILED AU6.ZI. I913. 1,239,293.

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557 WWW JOHN M. MURPHY. or ELGnr, ILLINOIS:

s'rmmr-swnnrma MACHINE Specification of Letters Patent.

Patented Sept. 4, 191'7.

A cauoii filed August 21, 1913. Serial no. 735359;

To (ill wl om it may concern:

Be it knownthat' I, Joi-iN MQMURPHY, a citizen of the United States, residing at Elgin, in the county of Kane and State. of Illinois, have invented a new and useful Improvement in Street-Sweeping Machines, of which the following is a. specification.

My invention relates to street sweeping machines designed to collect dirt from a street and carry it to a dumping place;'and among the objects offiny iiiiproveu'icn'ts are, first, to provide a truck supported on truetion wheels and hai'ing .a dirt rccepta rle shaped and arranged toiniprovetlie opera-- tion \vitrcspect to tile ized lohd" which the mac iiiie will talic 'aiid'praetie'ally han' dle; second, to provide it'sweepcr brush a dirt gathering pan; and dirt elevator arranged to he adiusted relative to the road bed and d signed to improve the operation. with respect to the collecting and delivery of dirt into the rec'ep taclefthird,to provide improved means in spraying. water upon the streetiinnnediately in advance 'of the brushs nd dirt pan in hf sheet of spray; fourth; to provide a motor f or propelling the truck iipon the street and o 'ierating the brush and elevator; hfth, to provide means whereby theipower driving the brush and elevator is automatically sliu toll' when said brush and elevator are lifted; and sixth, to

provide an improved dust pan connected with the elevator whereby the travel of the pan in front of the brush is bettered. Other objects will appear from the description'to renew.

The rnachineia' a combination of a street sweeping means and a water spraying means which are soa rranged and constructed to operate in conjunction with one another as "to accomplish the one; resijlt of gathering dirt from the street and drpositingit nto a receptacle without raising any ob]ect1 on able dust; 45

mechanism illustrated in the acco i'i 'ianying I attain the above painedolijerts by the five sheets of drawingsin which 1 Figure 1, (Sheet 1) IS an elevation of the left side of a machine e nliodyingniy invention; Fig.2, (Sheet 2) is an elevation "of the right side of the sanieyFig. 3, (Sheet is a top plan view; Fig. 4 (Sheet 4) is an enlarged vertical sectional View through the elevator and associated parts; Fig. 5 (Sheet 4) is a fragmentary plan view showing one of the water spraying devices; r 1 u (Sheet 4) is a sectional view taken on llne 6-6 of Fig. 5; Fig. 7 (Sheetl) is e'vertical sectional view taken on line 7--7 of Fig. 1, showing a part of the drive gear; Fig. 8 (Sheet 1) is a. detail sectional view showing a part of the brush lifting mechanism; Fig. .3 (Sheet 1) is a detail view showing the brush and dirt elevator in a raised position; Fig. 10 (Sheet 2) is an enlarged detail sectional view showing the inlet on the water tank; Fig. 1.1 (Sheet 2) is an enlarged detail view partlyv in section showing the outlet on the water tank; Fig. 12 (Sheet 5) is an enlarged detail view of the dirt pan employed in the machine; Fig. 13 (Sheet 5) is a vertical sectional view taken on line .lEl--l-" of Fig. 12; and Fig. 14 (Sheet 5) is an enlarged detail plan view partly in section showing a Dart of the driving mechanism. h

Similar reference characters refer to similar parts throughout the severalviews. The truck is preferably mounted on two front wheels 15 and one rear steering Wheel 16, and comprises a dirt receptacle 17, aperipher alUehaped beam or channel 18, cross heain 1S) and central pieces 20, all rigidly secured together by rivets and supporting the different parts of the machine. The frame of the machine being supported at three points i. c.', at each wheel it is unnecessary to provide for any flexibility in the frame which greatly sim lifies the construction of the Frame as we] as of the diffeu'ent mechanisms mounted thereon.

The dirt receptacle 17 is substantially square in cross section. and of a. length to ex- "trnd entirely across the frame between the parallel sides oftlie U-shaped beam' or frame 95 1S corrcspondi11;, to the upperiends of the U to the forward ends of which it is rigidly secured and acts as a stiffening brace for the frame as well as the receptacle int0- which the dirt from the street is delivered. 100

ered into the upper part of same will be de- 108 posited or settle within the same in such mannerba's to fill or occupy the entire interior of said receptacle. In this manner all the space within the receptacle is made available for the purpose of storing or re- 110 i taining dirt while a full load is being collected, and the size of the receptacle is reduced to a minimum. A

A rotary sweeper brush Q28 is rigidly mounted on a shaft 24 which is journaled in the lower free ends of twdearryln beams 25 pivoted at 26 to the beam 18 an forming a part of the truck. The position of the brush 23 is approximately midway between the front wheels 15 and the rear wheel 16, and the shaft 24 on which the brush 23 is mounted has its bearings in the carryin beams 25 sufliciently loose so that the axis of the brush 23 can tilt with respect to the plane of the supporting frame or surface of the road and thus at all times permit the brush to fallinto such looseness and come into contact with the street or roadbed automaticall throughout its entire lengtlr'while the mac ine is in action;

A dirt elev tor is provided immediately in advance of rush 23 for catching the dirt swept up by the brush and elevating the same to the upper part of the receptacle, and comprises a casin 27 pivotally mounted at its upper end to tie receptacle at 28 so that its lower end is free to swing up and down. The lower end of the casing is provided at each side with a wheel 29, 4, to travel on the street and support the lower end of the casing at a short distance above the ground during its travel.

The lower end of the casing is provided with a sectional dirt pan, the sections 30 of which are pivoted at 31 to have their free lower ends resting by gravity upon the ground. The purpose of making the dirt pan in sections is to have it automatically adjust itself to uneven road beds as it is dragged thereon and thus prevent any dirt from bein thrown beneath the pan by the brush. T e pan is located immediately in front of the brush, see Fig. 4, Sheet 4, so'

that the dirt as swept up by the brush will pass up the incline of the pan and be caught 1n the lower end of the casing 27 whence it is elevated and deposited into the receptacle.

The sections 30 of the pan, being pivotally mounted at 31, may incidentally be caught by the brush and be turned up above the line of their pivotal point unless some means is provided to prevent. To positivel limit the upturning of the pan sections on t eir pivot, I provide a bolt 33 (Figs. 12 and 13) on the lower side of each pan section 30, which extends loosely through a slot 34 in a cam plate 35 rigidly mounted on a rock shaft 36 ournaled 1n bearings 37 on the casing 27. The relative positions of the pivot 31, rock shaft 36, bolt 33, and slot 34 are such that the upturning of the pan sections will be limited at the proper time by the bolt 33 contactingwlth the end of the slot 34 as indicated by dotted lines in Fig. 13. When the machine is traveling up grade and is and also on account of some 0st motion in the driving gear, and to thus lift the free ends of the pan sections in unison, I secure a crank arm 38 rigidly to one end of the rock shaft 36, and connect the free end of said crank arm 38 to a link or rod 39 which is arranged to be 0 rated by a pedal 40. The pedal'i's pivotal y mounted at 41 to the frame of the machine, and connected by a rod 42 to a crank arm 43 on shaft 44 also mounted on the'frame of the machine;' a second crank arm 45 is mounted on shaft 44 and has its free end connected to the rod 39, so that as the pedal is pushed to the right as viewed in Fig. 2, the rod 39 and also the free ends of the pan sections will be lifted. Referring again to Figs. 12 and 13, it will be seen that as the free end of the crank arm 38 is lifted the rock shaft 36, will be partially rotated, and the free ends of all the cam plates 35 will be lifted to raise the free ends of the dirt pan sections as indicated by dotted lines in Fig. 13. The lifting or upturnin of the cam plates 35 is limited by the be ts 33 on the pan sections coming against the left end of the slots 34, as viewed in Figs. 12 and 13. By placing the rock shaft 36 some. distance from the pivotal point of the pan sections the operation of lifting said pan sections is made easier because the leverage is shortened.

To prevent dust from being raised and escaping fro the machine a water spraying device is provided to spray water upon the street immediately in advance of the brush 23 and the dirt pan, comprising a series of spraying nozzles 46 (Figs. 5 and 2) connected by a horizontal pipe 47 and a connectmg pipe 47 to a water tank 48 secured to the frame of the machine as clearly shown on Sheets 2 and 4 of the drawings. The water in tank. 48 is kept under constant pressure so that the water will be forced out ofthe nozzles 46 in a sheet of spray and not in streams.

The nozzles 46 are constructed as seen in F1 5. 5 and 6, with a rotatable stein 49 provi( ed with a tapering transverse hole 50 arranged to register with the water inlet 51 communicating with the pipe 47. When the nozzles are in use the osition of each stem 49 is as illustrated in ig. 6, with the larger end of the hole 50 communicating with the inlet 51 and the smaller end of said hole 50 in a position to direct the stream of Water under pressure against a flat surface 52 which will convert the stream of water into a thin flat body of spray. It will be noted that the quantity of water passing out through the nozzle 46 can be varied by slightly rotating such a height from the groun the stem 49 in one direction or the other as desired. Should there be any foreign matter 1n the waterlargeenough to clog the smaller end of the hole 50 the stem '49 can be turned a one halt revolution so that'the water under pressure from the inlet 51 .will pass through the hole 50in the reverse direction and force the obstruction out through the larger end of hole 50.

Experience has proven that the quantity of water applied to the dirt upon the street must be regulated somewhat in proportion to the quantity of dirt-to'give the best results, and this proper amount of water must be ap plied in a spray.

The nozzles 46 of which there is a row arranged in a horizontal line across the machine just below the elevator casin 27 and at that the several flat volumes of s ray from thc"n'ozzles 46 will be jpined an form one continuous unbroken sheet crosswise of the street and from one side of the machine to the other. T hesenozzles '46 are all connected to have their stems 49 operated simultaneously, and to thisend each stem 49 has rigidly so cured to its exposed end a gear wheel 53 which is in constant mesh with a companion gear 54 mounted on a horizontal shaft 55. Each of the gears54 is secured in position on the shaft 55 by means of set screw 56 so that each of the stems 49 can be individually adjusted in position. When properly adjusted all the stems 49 will be in exactly the same position so that the s ray from any one nozzle will be in identica plane with the sheet of spray from any other nozzle, and the stems 49 will all be turnedin unison when the shaft 55 is turned. A hand wheel 57 is pro vidednear the operators seat 58 for turning the shaft 55,'said hand wheel being secured to the upper end of a shaft 59 rotatably mounted in bearings 60 and having rigidly mounted on its l owercnd a gear wheel 61 in constant mesh with a gear 62 rigidly mounted on the one end of the shaft 55, the parts beinglso connected that'all the stems 49 of the nozzles 46 willbe rotated in uni-son in either directionwhen the-hand wheel 57 is turned. An angle iron 63 secured to the tank 48 by suitable bracesi64 is provided to support all the'nozzles 46 ar. the bearings for shaft 55. The seat 58 is mounted on the usual curved spring 65 rigidly secured to the frame of the machine.

The tank 43 is filled with water throu h a large hose 66 (Fig. '10) connected to t e 6 inlet pipe 67 provi dawith the valve 68. The valve 68 is opened to admit water into the tank 48 and is closed when the tank is full. Theeonstant pressure ismaintained in the tank by, means of an air pump 69.

Figs. 2 and 3, WlliGhiS connected means of a small .piipe. 70 with the upper part of the tank. ach cylinder of the pump is provided with a safety valve 71 to prevent any excess. ressure. The outlet pipe 47 connectin t e water tank 48 to the nozzles 46 is pre erably provided with a strainer to the'left as viewed in Fig. 2, and said valve straps 77 passing about the tank and having one end secured to the front wheel axle and the other end secured to the receptacle Fig.4. The upper part of the receptacle is provided with an opening 79 into which the (lift from the elevator 32 is discharged. The lower side of the receptacle is provided with a hinged door 80 normally held closed by chains 81 on each side of the truck which, after passing over the idlers 82 have their ends attached to crank arms 83 rigidly mounted. on the transverse shaft 84 mounted in bearings 85 secured to the cross beam 19. A hand lever .85 is secured to the shaft 84 for the purpose of manipulating said shaft for opening and closing the door 80. The door 80 is so located and arranged that it will open by force of gravity when released and all the dirt Within the receptacle will fall out through the open door.

To lessen the weight of the brush upon the street. I connect a coiled contracting spring 86 between the free end of the beams 25 and a bracket 87011 the beam 18 on each side of the machine. Similarly, to lessen the weightof thelower-end of the elevator casing'upon the street, I connect a coiled contracting spring 88 between the lower end of the elevator casing and a bracket 89 on the beam 18 on each side of the machine. In this manner there is always suflicient weight on thebrush to make a clean sweep, and the easy lifting of the brush entirely off the street is facilitated. Breferably only one hand lever 90 is provided for lifting both the bllLlSll and the lower endof the ole itor casing up .ofl' the. ground substantialiy in unison. The hand levenQO is rigidly mountedon one endof a rock shaft 91 extending entirely across the machine and mounted in bearings 62 on the frame of the machine. Each end of the shaft 91 is provided with a "of the crank arnis 93. The parts are so arranged and connected that the lifting of the ,hbnddever 90 from its lower osition to its 11 per position will rock the s aft 91, raise e crank arms 93 from the position shown in Fig. 1 to the position shown in Fig. 9, and lift both the brush and the elevator casing off the ground; the springs 86 and 88 assisting materially in the liftin To retain the said parts in a lifted position a coiled contracting spring 95 is interposed between a suit able bracket 96 secured to the machine frame and the free end of a crank arm 97 rigidly secured to the shaft 91. The position of the free end of the crank arm 97 with relation. to the pull exerted by the spring 95 is such, that practically no pull to rotate shaft 91 is exerted by the spring 95 when the brush and the elevator casing are resting on the ground and the shaft 91 is in the position shown by full lines in Fig. 8, but that said spring 95 will exert a pull to rotate said shaft 91 as soon as the brush and the elevator casing are only slightly lifted off the ground and will rotate said shaft into the position indicated by dotted lines in Fig. 8. The shaft 91 is prevented from otating, to the right as viewed in Fig. 8, too far y a stop 98 secured to the beam 18, against which one of the crank arms 93 strikes (see Figs. 2 and 3). The hand lever 90 as well as the hand lever 85 is within easy reach of the operator seated in the seat 58.

The steering wheel 16 is mounted to swing about a vertical pivot at 99 and an arm 100 which is rigidly secured to the wheel fork has its free end connected in means of a rod 101 to the free end of t e crank arm 102 ri 'dly secured to the ;lower end of a verticsfi shaft 103 mounted in hearings on the machine frame. A hand wheel 104 is secured to then per end of the shaft 103 by means of whic the shaft; is turned in its bearings to, turn the rear wheel -16 and steer the machine in its course. H i

A motori105 is mounted on the rean of the truck frame and is inclosed in a '1 or hduslng 106. By connecting means described the motor operates; the tram 55- wheels 15, the elevator 32, thebbrush '23, and the pump 69., In the drawings the motor 105 18 shown to be a. gasolene engine, and a asolene tank 107 is provided to carry a supp y of solene. The engine shaft is seen at 108, ig. 3, the usual transmission gear located within the housing 109, and the usual differential gear is within the housing 110, o -t of which project in opposite irections t e shafts 111 and 112, the forms connected, by means of chain and sprockets 113 to one front wheel 15, and the latter connected by means of chain and sprockets 114 to the other front wheel 15. Suitable brake wheels 115 are provided on each shaft 111 and 112 and are connected by the usual levers and rods 116 to the foot lever 117, by means of which the machine is stopped.

The rotation of the brush and the elevator must be the reverse of that of the front traction wheels 15 and to secure such reverse rotation I mount a gear 118, Fig. 14, to constantly mesh with another gear 119 rigid with the gear 120 of the differential gearing which is in constant mesh with the gear 121 rigidly mounted on the engine shaft 108. There is the customary clutch (not shown), between the engine shaft 108 and the engine 105 which is operated by the foot lever 122,

The gear 118 is rigidly mounted on shaft 123 mounted in suitable bearings in the casing 124 rigidly secured to the casing 110. One end of the shaft 123, Figs. 14 and 3, extends out of the casing 124 a material distance where it has rigidly secured thereto one member of a clutch 125, the other member of which is mounted rigidly on the end of a concentric shaft 126, so that the operation of shaft 126 is controlled by the open or closed position of the clutch 125. The end of the shaft 126 remote from the clutch 125 is mounted in a suitable bearin 127 on beam 18 and has rigidly secured t ereon a sprocket 128 connected by chain 129 to the sprocket 130 rigid with the sprockets 131 and'132 which are loosely mounted on the shaft 26 forming the fulcrum for the beams 25. The sprocket wheel 131 is connected by means of chain 133 to the s rocket wheel 134 rigidly mounted on sha t 24 carrying the brush, and the sprocket wheel 132 is con nected by means of the chain 135 to the sprocket wheel 136 rigidly mounted on the s aft 28 forming the fulcrum of the upper end of the elevator casing 27. The shaft 28 extends from one side of the machine to the other and has rigidly mounted thereon the upper driving sprocket wheels 137,

Fi 4, of a belt con'veyer 32. At the lower en the belt 'conveyer passes around the j,idlers 138.

Thoshaft 126 rotates in an opposite dire'ctio'l to the shafts 111 and 112 and it is connected to positively drive or rotate the brush 28 and the elevator elt.

The operation of said haft 126 is con trolled by the clutch 125, which, if closed, will rotate shaft 126, and if open, the shaft 126 will remain idle. The operation of the clutch 125 is conveniently performed simultaneously with the lowering and raising of the brush 23 and elevator casing 27 by connecting the clutch operating lever 1.39, Figs. 3 and 14, by means of a rod 140 to the free end of the crank arm 141 rigidly mounted on the rock shaft 91. The parts are so arranged and connected that the clutch 125 will be closed when the brush 23 and Thus by lowering the hand lever 90 t e brush 23 and elevator 32 are caused to operate and by raising the saidhand lever 90'the brush and elevator are placed" in their inoperative position. v

.A shield or bafile 1.42 is mounted on the elevator casing 27 to extend 'from. the lower end of the upper side of said casing at 143 to a point above the rear side of the brush 23 to prevent anydirt from being thrown above the brusln Hinged doors 144 and 145 are provided on the upper sides of the ole vator casing 27 and the dirt receptacle 17 reslpectively.

will not claim herein the sprinkling device per 86, in view of the fact that the same has been held to more properly constitute the subject matter for a divisional. application, I am aware that prior tomy invention street sweeping machines have been made with a verticallyswinging rotatable brush operating in conjunction with an elevator,

at dirt'receptacle and a sprinkling means,

and I therefore do not claim such a combination broadly, but I claim 1: In an apparatus of the elassdescrihed, a dirt pan compr sing a plurality of sections each of which is pivotally connected t one.

end. to a carrying member and arr-a1 7; 1 to halve its free end gravitate upon the ground, a rock shaft under the pan sections remote fronrand parallel to the axis of the pivotal connections of the sections, slotted earn of said amp]; nd

platesrigidly secured to Said rock shaft arranged to engage the under sides of said sections, headed bolts depending from the pan sections. and extendin through the slots in the cam plates where ythe raisin of the pan sections is limited, and means for osc1l latin the rock shaft. l

2. In an apparatus oftlie class described, a truck frame an inclined elevator mounted on said frame having its upper end pivotally connected to the frame to have its lower end free to move up and downin an are, a pair of inclined beamshaving their upper ends pivotally connecte to said frame and a sweeper brush r0 atably mounted on the lower ends of said beams so that the sweeper brnsh isfree tomoveup anddown in an are, a rock shaft mounted on said frame rovided with a crank arm 'at each end, exible" connections between the. ,free ends f id p ank. armsjndfthe lower vtree ends inclined bean e, a third crank arni onset oek shett, aspr ng c911.- nected between 'thefree, offsard third.

the free ends of the elevator and inclined beams in a raised position.

3. In a street sweeping machine, the com- :bination with a supporting frame, of dust collecting means including a brush. and a conveyor associated with said brush, said conveyer being pivotally nounted at its upper end and relatively free at its lower end which approximates the surface of the road, means for pivoting the brush relative to the frame, spring suplmrting means for the brush and free end of the conveyeua com noon" positive elevating means for the brush and conveyor, sai elevating moans COHJPIlS- ing chains connected to an actuating'lcver and having branches running; to the free end of the con vcycr and to the lnu'sli, in combination with means for retaining-the brush and to the ground, the lower portion of the receptacle being providml with a'discliarge opening and closure therefor, and collecting means adaptvd to discharge into'the inlet of the receptacle.

5. In a street sweeping niaehinuftlm combination with a frame liavingsidc members, of fillpllllltlllg wheels all the forward end oi saidjrnlnc, a receptacle supported between said frame members at approximately the center oi" the rcmaeptaclc. the upper walls of the receptacle converging upwardly and providci'l with an inlet at the highest point thereof, and the. lower walls converging downwardly to a point in advance of the axis of the supporting 'w'l'ieels and adjacent to the ground, theilower portion of the receptacle being provided. with-a discharge opening and closure therefor, and collecting means adapted to discharge into the inlet of the receptaelmsaid collecting means being tothc adjacent upper wall of the receptacle crank arm andthe; frag hold'. the rock shaft in a posit on ireqii red to hold andfto a point ,near the ground, substantially as described.

6. In astreet sweeping machine, the combination with a. frail-1e havin side members, of en porting wheels at the. firward end of said rame, a receptacle supported between said frame members at apj'n'oximately the centerof the receptacle, the upper walls of- I provided with an inlet at the highest point thereof, and the lower walls conver 'ng downwardly to a point in advance 0 the axis of the supporting wheels and ad'acent to the ground, the lower portion of t e receptacle being provided with a discharge opening and closure therefor, collectin means adapt-d to discharge into the inlet 0 the receptacle, said collecting means extending downwardly approximately parallel to the adjacent upper wall of the receptacle and to a pointnear the ground and leaving an approximately inverted V-shaped space between the adjacent lower wall of the receptacle and the collecting means, and a water tank supported in said space and provided with spraying means, substantially as and for the purpose described.

7. In a street sweeping machine, the combination with a frame having side members, of supporting wheels at the forward end of said frame, a receptacle supported between said frame members at approximatel the center of the receptacle, the upper wa ls of the receptacle converging upwardly and provided with an inlet at the highest point thereof, and the lower walls converging downwardly to a point in advance of the axis of the supporting wheels and ad'acent to the ground, the lower portion of t e receptacle being 'rovided with a discharge opening and closure therefor, collecting means adapted to discharge into the inlet of the receptacle, said collecting means extending downwardly approximately parallel to the adjacent upper wall of the re-- ceptacle and to a point near the ground and' leavin an approximately inverted V-shaped space etween the adjacent lower wall of the receptacle and the collecting means, and a water tank supported in said space and rovided with spraying means, said tank eing secured in place by hangers engaging the same and the wheeled supporting means at one side and the receptacle at the other side.

8. In a street sweeping machine, the combination with a frame having side members, of supporting wheels at the forward end of said frame, a receptacle supported between said frame members at approximately the center of the receptacle, the upper walls of the receptacle converging u wardly and provided with an inlet at the highest point thereof, and the lower walls converging downwardly to a point in advance of the axis of the supporting wheels and ad'acent to the ground, the lower portion of t e' feeeptacle being provided with a discharge opening and closure therefor, collecting means adapted to discharge into the inlet of the receptacle, said collecting means being pivoted to the top of the receptacle and extending downwardly approximately parallel to the adjacent upper wall of the receptacle and to a point near the ground and leaving an approximately V-shaped space between the ad'acent lower wall of the receptacle and t e collecting means, beams pivotally mounted in said space between the receptacle and the collecting means and passing rearwardly across the collecting means, and a brush carried by the free ends of said beams operatively associated with the collecting means.

9. In a street sweeping machine, the com bination with a frame having side-members, of su porting wheels at the forward end of said rame, a receptacle supported between said frame members at approximately the center of the receptacle, the upper walls of the receptacle converging upwardly and provided with an inlet at the highest point thereof, and the lower ends converging downwardly to a point in advance of the axis ofthe supporting wheels and adjacent to the ground, the lower portion of the receptacle being provided with a discharge opening and closure therefor, collecting means adapted to discharge into the inlet of the receptacle, said collecting means being pivoted at the top of the receptacle and extending downwardly approximately parallel to the adjacent upper wall of the receptacle and to a point near the ground and leaving an approximately V-shaped space between the adjacent lower wall of the receptacle and the collecting means, a water tank supported in said space and provided with spraying means, beams pivotally mounted in said space between the receptacle and the collectin means and passin rearwardlv across the co lecting means, an a brush car ried by the free ends of said beams operatively associated with the collecting means.

10. In a street sweeping machine, the combination with a frame having side members, of supporting wheels at the forward end of said frame, a receptacle supported between said frame members at approximately the center ofthe receptacle, the upper walls of the receptacle converging upwardl' and provided with an inlet at the higli est point thereof, and the lower walls converging downwardly to a point in advance of the axis of the supporting wheels and adjacent to the ground, the lower portion of the rc ceptacle'being provided with a discharge opening and closure therefor, collecting means adapted to discharge into the inlet of the receptacle, said collecting means extendmg downwardly approximate] parallel to the adjacent upper. wall of t e receptacle and to a. point near the ground and leaving an approximately inverted V-shaped space between the adjacent lower wall of the receptacl and the, collecting means, a water tank supported in said space and provided with spray ng means, a hose section connected to the tank bywhich the latter me he lillcrhnnd a support mounted on the co lecting menus for said hose section when in inoperative position.

11. In a street sweeping machine the combination with n supporting frmne, of a wheeled support at the forward end theredf, a receptach mounted on said frame and depending therefrom forwardly of the axis of the wheels to a position near the ground, collecting means discharging into the upper portion of the receptacle, and a closure for the discl'nirgc opening at the front of the lower portion of the receptacle, said closure being pivoted at its upper end to swing outwardly and the rear lower wall of the receptacle int-lining downwardly and forwardly, substantially as described.

12. In a street sweeping nmchine, a brush, a m'ovably mounted dirt pan operably associated with the brush, valved .mieans for spraying the ground, and mechanism for lowering; and raisin the dirt pan while si multaneously opening or 'rlosing the valve of the spraying means.

13. In a street sweeping machine, a brush, means for receiving the dirt from the brush, said means being mounted for movement into and out of operative position, means for nioistening the grouni l, controlling, means for the moistcning means, and means for adjusting both said controlling means and said dirt receiving: means in manipulation of one oi then;

ii. in a #1 root swooping nnn'hine, dirt collecting instrumentalities, uwans for raising and lowrringthc same with reference to the,

ground including an operating: lever, a crank opcrativclv conne ted tlu-rcwith, connections between the crank and the dirt collecting means effecting the raising and lowering of said last mentioned means in keeping with the position of the c l'nl1l(,in combination with means for assisting in maintaining the dirt collecting means in raised position comprising: an arm pivoted near the end of the crank and extending backwardly therebcyond, and a spring connected to the free end of the arm and to a fixed part ofthe ma chine, said'arm being shaped to passthrough and depend in rear of the pivoted end of the crank when the dirt collecting mcans is lowered to operating position to render the spring inactive.

15. In a street sweeping machine dirt collecting instrmncntalities, and a receptacle into the top of which the dirt collecting instrumentalities discharge. said receptacle being closed throughout, save at its inlet and being of angular formation in cross section to present converging upper wells meeting at approximately the inlet of the receptacle and similar lower walls forming ahopper, adapted to discharge at approximately the juncture of the lower wells, one of the well? being provided with e movable closure to bination with a supporting frame, having" wheel supports at its opposite ends, dirt collecting instrumentelit-res arranged to approach the ground at a point intermediate ot' the wheel supports, a 1 receptacle into which the dirt collecting instrumentalities discharge, saidreceptacle being mounted on thet'rame and having a portion depending below the frame in advance of; the orward wheel support and between the latter.

17. In a Street sweeping machine, the combinetion with a wheeled supporting frame, a motor thereon collecting mea'nsincluding a, rotary brush, driving instrumentalities between the motor and the wheels of the frame and between the motor and the rotary brush including differential mechanism for the wheels, and means for maintaining a. constant drive of the brush irrespective of the varying movements of the differential mechamsm.

18. In a street sweeping machine, the combination with a wheeled supporting frame, of collecting means including a rotag brush, a motor mounted on said frame, di erential driving connections between the motor and the wheels of the frame, and constant drive connections between a part of said differential mccmmism end the brush whereby the movement of the latter will be uniform while permitting variations in the movement of the differential mechanism.

, 19. In a street sweeping machine, the combination with a wheeled supporting frame, of collecting means including a rotor brush,

a motor mountedon said frame, di erential driving connections between the motor and the wheels of the frame, and constant drive connections between a part of said di'fierent'uil mechanism and the brush whereby the movement of the latter will be uniform while permitting variations in the movement of the differential mechanism, said last connections comprising intermeshlng gears and a drivmg shaft for the rotary brush arranged erellel to the axis ofrotation ofthe drive w eels.

20. In a street sweeping machine, ippivotally mounted dirt pan, means for raisin "the free end thereof comprising a rocke -i aft mopntcd thereunder, a slotted cam plate rigid on the rock shaft, and a heeded bolt depending from the dirt pen and extending its lower end free to swing up and down, a.

their upper pair of inclined beams having truck frame,

ends pivotally connected to sai n sweeper brush rotatably mounted on the lower ends of said beams, 11 rock shaft mounted on said frame provided with a crank arm at each end, flexible connections between the free endsof said crank arms and the lower free ends of said elevator and said inclined beams whereby the rocking of the shaft will lift the lower ends of the elevator and beams and yieldable means for locking the rock shaft in a position required to hold the free ends of the elevator and the beams in a raised position.

22. In a street sweepin machine, the combination with a, suitab e frame, traction wheels, rotatable broom, elevator, and motor, of driving connections between the mo tor, traction wheels and broom including it driven shaft operatively connected to the said traction wheels, power transmitting mechanism comprising transmissitm and d ifferential gearing interposed between the motor and said shaft, and another driven shaft: in mesh with the diiferentiel end of said power transmitting mechanism to be ro-- tated by the ower transmitted through the various spee s of the transmission in a direction the reverse of the rotation of the traction wheels to correspondingly rela tively rotate the broom while said traction wheels are being driven.

23. In 'a street sweeping machine, the com binetion with a suitable frame, traction wheels, rotatable broom, elevator, and motor, of driving connections between the motor, traction wheels and broom including a driven shaft opemtively connected to the said traction Wheels, power transmitting mechanism comprising transmission and differential gearing interposed between the motor and said shaft, another driven shaft in mesh with the differential end of said power transmitting mechanism to be rotated by the power transmitted through the va rious speeds of the transmission in a direction the reverse of the rotation of the treetion wheels to cm'respoinlingly relatively ro tote the broom while the traction wheels are being driven, and clutch mechanism eluted with the lust mentionedslnift for C0l1- trolling the rotation of the broom.

JOHN M. MURPHY. lVitnesses R. J. J AUKER, M L. Fnnnr. 

